Acids and alkalis

• How can the ph of water be affected?

  by the addition of soluble substances
• What do soluble metal oxide produce?

  Alkaline solutions
• what do soluble non-metal oxides produce?

  Acidic soluble
• What will not affect the ph of water?

  Insoluble oxides
• What is CO2?


  a by-product of burning fossil fuels but another large contribution is made by cement manufacturers for use in new buildings
• non-metal oxides play a large role in the environment:

  carbon dioxide, sulpher dioxide and oxides of nitrogen are produced as a result of our continued use of fossil fuels.

  alrhough these oxides are produced in nature the increased production of these oxides Is linked to environmental problems including acid rain, global warming and ocean acidification
• What do acids do to food and drink Industry?

  preserve food by picking in vinegar
• What do these acids do to human health?

  indigestion and tooth decay
• a neutralisation reaction is one in which an acid reacts with a base to for water

  a salt is also formed In this reaction
• what are bases?


  metal oxides, metal carbonates, metal hydroxides and ammonia
• the course of a neutralisation reaction can be followed using a ph indicator; if the base is insoluble an indictator is not required
• How can these reactions be described?

  Word equations
• What does hydrochloric acid make?

  Chloride salt
• What does sulphuric acid make?

  sulphate salt